Improvement in chain gripes and tighteners



1. N. &'G. J. ADKERMAJI.

Chain-Grip and Tightener. 4 159 057 PatentedJan.26,!875.

WITNESSES INVENTUB ATTORNEYS.

UNITED STATES PATENT OFFICE.

JOHN N. AGKERMAN AND GEORGE J. AOKERMAN, OF HAOKENSAOK, N. J.

IMPROVEMENT IN CHAIN GRIPES AND TIGHTENERS.

Specification forming part of Lettem Patent No. 159,057, dated January26, 1875; application filed December 19, 1874.

To all whom it may concern:

Be it known that we, JOHN N. ACKERMAN and GEORGE J. ACKERMAN, ofHackensack, Bergen county, New Jersey, have invented a new and ImprovedCombined Chain Gripe and Tightener, of which the following is aspecification:

The object of this invention is to provide means whereby a chain may bedrawn tightly around a load of lumber, or up or around other objects,and held firmly in such position, the construction and operation ofwhich will be understood from the following description, reference beinghad to the accompanying drawing forming a part of this specification.

Figure 1 represents a sectional elevation, showing my invention asapplied; and Fig. 2 is a plan of the same, bottom side up.

Similar letters of reference indicate corresponding parts.

1n the case here presented the letter A represents a cast-iron frame,having a sheave, B, pivoted at O. D is a lever, whose end is yoked so asto receive the aforesaid frame A, and is pivoted thereto by the samebolt which passes through the sheave. E is a pawl pivoted on the yoke ofthe lever, and F is a spring to keep it held in position. Gis a pawlpivoted in the upper end of frame A, and H is a fixed pin, on which thechain is coupled.

To operate this device I place the flat side a of the frame A againstthe load and throw the chain I over the load, and then, bringing itaround under the load, I pass the chain up over the sheave, and thendown through the yoke of the lever; then, by pulling the said leverdownward, it will cause the pawl E to gripe the chain and draw itthrough, and the pawl G, resting on the sheave above the chain willgripe and hold it while the leverD is being raised in position for afresh gripe, and so repeated till the chain shall have been drawntightly around the load, at which time the pawl G will hold the chainsecure.

The lever has a socket, J, in which a bar may be placed when necessaryto apply additional power.

After having drawn the chain as tight as required, the lever is movedflush with the load, so as to be out of the way in traveling.

It is not absolutely necessary to have the spring F to hold the pawl Ebearing against the chain, as the pawl would naturally gripe the chainwhen the lever is raised in an upright position, and would hold its gripuntil the sheave had made nearly one-half of a revolution.

The apparatus is also applicable for raising heavy weights; also forraising anchors, and for various other purposes.

When it is used for hoisting purposes and the like, the frame A will bemounted on any suitable support, and secured or not, as required, oritwill be suspended by the pin H.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent The frame A, having chain I on pivot H, and thepawl G, combined with pulley B and spring-pawled lever D on the samepivot O, as and for the purpose specified.

JOHN N. AOKERMAN. GEORGE J. AOKERMAN. Witnesses:

DAVID TERHUNE, A. G. BASEL.

